JPS6349604Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a high-frequency heating device, particularly to an improvement of a microwave oven equipped with a door opening button and having a push-type door opening structure.

[Technical background of the invention and its problems]

High-frequency heating devices are widely used in general households as microwave ovens. It is well known that the main body of this type of device includes a heating chamber having an opening on the front surface, and the opening is opened and closed by a door body. Conventionally, the door body is provided with an opening handle, and when taking out or taking out food, the door body is opened by grasping the opening handle.

Nowadays, from the viewpoint of design and operation, many microwave ovens are equipped with a door opening button instead of the above-mentioned opening handle. That is,
The door opening button has a smaller surface area than the opening handle, and the door opens by simply pressing the button with your finger, making it very convenient to use.

The door opening button above is attached to the control panel,
Its tip faces a push lever of a door opening mechanism provided inside the main body. When the door opening button is pressed, its tip comes into contact with the push lever, pushing it up and urging it to rotate. Further, the door opening mechanism includes a slider, which is pushed up in the vertical direction as the push lever is rotated, thereby pushing up the hook. Since this hook protrudes from the door body and closes the opening by engaging with the main body, the door body opens when the hook is pushed up.
The door opening button is made of a synthetic resin material such as ABS because it is exposed on the surface of the operation panel and maintains an aesthetic appearance. On the other hand, the push lever is made of a rigid metal plate, for example, in order to frequently receive the pressing force of the door opening button and to ensure the force to push up the slider or hook.

However, due to this selection of materials, the tip of the door opening button that comes into contact with the push lever will wear out over a long period of use, resulting in a shortened stroke. As a result, the opening operation of the door body may not be smooth, and in the worst case, it may become impossible to open the door body. Also, if the pressing force is extremely strong,
The tip of the door opening button may be damaged.

[Purpose of invention]

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to improve the wear resistance of the tip of the door opening button in push-type door opening structures, and to improve the wear resistance for long-term use. It is an object of the present invention to provide a high-frequency heating device that allows a door to open smoothly even during use.

[Summary of the idea]

In other words, in the present invention, by pressing the door opening button provided on the operation panel, the push lever of the door opening mechanism rotates in response to this, and this slider is further pushed up in the vertical direction, and the hook protruding from the door body is rotated. The door opening button is actuated to disengage from the main body and open the opening, characterized in that a wear-resistant button cap is fitted to the tip of the door opening button that comes into contact with the push lever of the door opening mechanism. This is a high frequency heating device.

[Example of idea]

Hereinafter, one embodiment of the present invention will be described based on the drawings. FIG. 1 shows a microwave oven which is a high frequency heating device. On the front side of the main body 1, a door body 2 (not shown) for opening and closing an opening of a heating chamber is rotatably mounted, and an operation panel 3 is provided alongside the door body 2. The operation panel 3 is provided with a timer knob 4 for setting a cooking time, a cooking switch button 5, and a door opening button 6 at predetermined intervals in the vertical direction.

To further explain the operation panel 3, as shown in FIG. 2, a hole 7 into which a cooking time setting timer knob 4 is inserted is opened at the upper part of the operation panel 3a, and a cooking switch button 5 is located at the lower part of the hole 7. and recesses 9, 10 into which the door opening button 6 is inserted, and guide portions 11, 1 into which these are slidably fitted.
2 is provided. In addition, button 5 for cooking switch
Coil springs 13 and 14 are wound around the rod portions 5a and 6a of the door opening button 6, respectively, and stop pins 15 and 16 are attached to the tip portions protruding from the guide portions 11 and 12, respectively. Note that a button cap 17, which will be described later, is provided at the tip of the door opening button 6.

As shown in FIG. 3, a cooking switch mechanism 18 is provided in the main body 1 facing the cooking switch button 5, and a door opening mechanism 19 is located in the main body 1 facing the door opening button 6. are provided respectively. To explain further, the above cooking switch mechanism 1
8 is a switch lever 20 that faces the tip of the cooking switch button 5 and is rotatably supported;
It consists of a cooking switch 21 provided at a position where this switch lever 20 approaches and separates. The door opening mechanism 19 also includes a push lever 22 rotatably supported opposite to the tip of the door opening button 6;
As the push lever 22 rotates, the slider 23 is urged to slide in the vertical direction, and the door switch 2 is provided at a position spaced apart from each other.
It consists of 4,25. Note that two hooks 26 and 27 are provided protruding from the back side of the door body 2 and can be freely engaged with and detached from the main body 1. Usually, the push lever 22 is made of a bent metal plate, and the slider 23, like the switch lever 20, is made of a synthetic resin material. Hook 2 above
6 and 27 are inserted into the interior through an opening provided in the operation panel 3a when the door body 2 is in the closed state, and are elastically biased so as to come into contact with the door switches 24 and 24.

Next, the door opening button 6 will be described in detail. That is, as shown in FIG. 4, when the door opening button 6 is pressed against the elastic force of the coil spring 14, the rod portion 6a is guided by the guide portion 12 and retracts to the back, and the rod portion 6a is recessed into the back, and the rod portion 6a is guided by the guide portion 12. The button cap 17 is adapted to come into contact with the push lever 22. Naturally, there is a certain amount of clearance between the rod portion 6a and the guide portion 12, and due to its own weight, the button surface side is downward and the tip side is upward as a whole, as shown by the two-dot chain line in the figure. I try to lean towards it. In other words, the smooth sliding of the door opening button 6 is likely to be hindered. Therefore,
The stop pin 16 is designed as shown in FIGS. 5A and 5B. The pin portion 16a on the insertion side of the rod portion 6a is formed in a straight shape, whereas the pin portion 16b on the side for holding the rod portion 6a is bent so as to be slightly inclined laterally. And again, as shown in Figure 4,
Since the inclined pin part 16b is set to be located on the upper side, this inclined part applies an elastic force to correct the inclination of the door opening button 6, so that the door opening button 6 can always be kept horizontal. It's getting old.

Further, as shown in FIG. 6, the button cap 17 is fitted onto the door opening button 6. That is, the door opening button 6 is made of, for example, an ABS synthetic resin material, and the rod portion 6a has a cylindrical shape with an open end. On the other hand, the above button cap 1
Reference numeral 7 is made of a wear-resistant synthetic resin material such as nylon, and is machined from a round bar to have a substantially convex cross section. The base end 17b is fitted into the rod 6a until the collar 17a comes into contact with the tip edge of the rod 6a, and mounting holes 28, 28 are bored in the rod 6a and the base 17b. , and finally the snap pin 29 is forcibly inserted. By attaching the button cap 17 to the door opening button 6 in this manner, the flange 17a of the button cap 17 is exposed and comes into contact with the push lever 22.

However, when putting in and taking out food, etc., the door body 2
To open the door, the cook presses the door opening button 6. The door opening button 6 slides toward the back, and the button cap 17 at the tip comes into contact with the push lever 22. As a result, the slider 23 moves and pushes up the hooks 26 and 27 to disengage them, and the door body 2 is opened. Since the button cap 17 has wear resistance, there is no wear even though the push lever 22 is made of a metal plate, and smooth button operation can be achieved over a long period of time.

In this way, in the above embodiment, the button cap 17 is made of so-called solid material carved out of a round bar, so it is easier to align the mounting holes 28, 28 compared to, for example, a hollow pipe. As a result, the snap pin 29 can be easily inserted.

In the above embodiment, the operation panel 3 is provided with the cooking time setting knob 4, but instead of this, an adjustment volume that can set the heating time and output may be provided. That is, Figures 7 and 8
As shown in the figure, a recess 3 is formed in a part of the operation panel 3a.
0 is provided, and the shaft 32a of the adjustment volume 32 is inserted into the through hole 31 drilled here, and then tightened with the attached nut 33. Of course, a knob 34 is attached to the shaft 32a. Therefore, even if the keyboard and keyboard board are attached to the back side of the operation panel 3a, they will be completely separate from the adjustment volume 32, so the operation panel 3a will receive the biasing force against the adjustment volume 32, and the keyboard etc. has no effect. Furthermore, even if the knob 34 is printed on the operation panel 3a, no positional shift occurs.

[Effect of idea]

As explained above, according to the present invention, a button cap made of a wear-resistant material is fitted to the tip of the door opening button that comes into contact with the push lever of the door opening mechanism. This has the effect that the opening operation of the door body can be made smooth over a long period of time, and usability can be maintained.

[Brief explanation of drawings]

1 to 6 show an embodiment of the present invention, in which FIG. 1 is a perspective view of a microwave oven, which is a high-frequency heating device, and FIG. 2 is an exploded perspective view of its operation panel.
Figure 3 is a perspective view of the main parts on the back side of the operation panel, Figure 4 is a partially cutaway side view showing how the door opening button is installed, Figure 5 A is a side view of the stop pin, and Figure B is its front view. 6 is a vertical sectional view of the door opening button, FIGS. 7 and 8 show other embodiments of the present invention, FIG. 7 is a side view showing how the adjustment volume is installed, and FIG. FIG. 3...Operation panel, 6...Door opening button, 19...Door opening mechanism, 2...Door body, 17...Button cap.

Claims (1)

[Scope of utility model registration request] a main body equipped with a heating chamber having an opening on the front;
A door body is provided with a hook that is pivotally connected to the heating chamber opening of the main body so as to be openable and closable and engages with the main body when the opening is closed; An operation panel with a door button,
When the door opening button is pressed, the tip of the push lever comes into contact and is urged to rotate, and the rotation of the push lever forces it to slide in the vertical direction and comes into contact with the hook, causing the hook to engage with the main body. The door opening mechanism is equipped with a slider for releasing the button and is disposed inside the main body, and is characterized in that a wear-resistant button cap is fitted to the tip of the door opening button that comes into contact with the push lever. High frequency heating equipment.